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PROPERTY AND EQUIPMENT
6 Months Ended
Jun. 30, 2013
Property, Plant and Equipment [Abstract]  
PROPERTY AND EQUIPMENT
NOTE 5 — PROPERTY AND EQUIPMENT
 
Property and equipment is comprised of the following at June 30, 2013 and December 31, 2012:
 
 
 
Estimated Useful Life
 
2013
 
2012
 
Field operating equipment
 
3 – 10 years
 
$
81,944
 
$
82,798
 
Vehicles
 
3 – 5 years
 
 
3,593
 
 
2,408
 
Leasehold improvements
 
2 – 5 years
 
 
459
 
 
473
 
Software
 
3 – 5 years
 
 
998
 
 
1,063
 
Computer equipment
 
3 – 5 years
 
 
4,280
 
 
4,080
 
Office equipment
 
3 – 5 years
 
 
830
 
 
864
 
 
 
 
 
 
92,104
 
 
91,686
 
Less: Accumulated depreciation and amortization
 
 
 
 
(28,134)
 
 
(21,230)
 
Total
 
 
 
$
63,970
 
$
70,456
 
 
The Corporation reviews the useful life and residual values of property and equipment on an ongoing basis considering the effect of events or changes in circumstances.
 
Total depreciation and amortization expense for the three months ended June 30, 2013 and 2012 was $3,683 and $2,973, respectively, of which $3,426 and $2,824, respectively, was recorded in direct operating expenses and $257 and $149, respectively, was recorded in depreciation and amortization. For the six months ended June 30, 2013 and 2012, total depreciation and amortization expense was $7,458 and $5,756, respectively, of which $6,936 and $5,468, respectively, was recorded in direct operating expenses and $522 and $288, respectively, was recorded in depreciation and amortization.